HTML - minlength Attribute

HTML minlength attribute is used to define the minimum number of characters that a user can enter into an input or textarea field.

If no minlength attribute is specified, or any invalid value is specified, the input has no minimum length. The entered value length must be greater than or equal to the minlength value.

Syntax

<tag minlength = 'value'></tag>

Where the value can be any integer value(0 or higher).

Applies On

Below listed elements allow using of the HTML minlength attribute

Element	Description
<input>	HTML <input> tag is used accpect various types of input from user.
<textarea>	HTML <textarea> tag is used to represent a multiline plain-text editing control.

Examples of HTML minlength Attribute

Below examples will illustrate the HTML minlength attribute, where and how we should use this attribute!

Set minlength on input

In the following example, we are going to use minlength attribute with the input type=text to set minimum length for name input is 10.

<!DOCTYPE html>
<html lang="en">
      
<head>
   <title>HTML 'minlength' attribute</title>
</head>

<body>
   <form>
      <input type="text" 
             minlength="10" 
             placeholder="Enter Name">
      <br><br>
      <button>Submit</button>
   </form>
</body>

</html>

Set minlength on textarea

Considering the another case, where we are going to use the minlength attribute with the textarea element to set minimum acceptable length of characters in textarea as 15.

<!DOCTYPE html>
<html lang="en">

<head>
   <title>HTML 'minlength' attribute</title>
</head>

<body>
   <form> Write your feedback: <br>
      <textarea name="" 
                id="" 
                cols="30" 
                rows="5" 
                placeholder="Your feedback...." 
                minlength="15">
      </textarea>
      <br>
      <button>Submit</button>
   </form>
</body>

</html>

Supported Browsers

Attribute
minlength	Yes 40.0	Yes 17.0	Yes 51.0	Yes 10.1	Yes 27.0

html_attributes_reference.htm